Generic Name: verapamil, Oral tablet

Calan

All Brands

  • Calan
SECTION 1 of 4

Highlights for verapamil

Oral tablet
1
VERAPAMIL (ver AP a mil) is a calcium-channel blocker. It affects the amount of calcium found in your heart and muscle cells. This relaxes your blood vessels, which can reduce the amount of work the heart has to do. This medicine is used to treat chest pain caused by angina, high blood pressure, and controls heart rate in certain conditions.
2
This drug also comes in other forms, including Oral capsuleParenteral Solution
3 4 5
Talk to your healthcare provider if you have any of these conditions.
6
Know what to watch for and get tips for reducing your risks while taking this drug.
SECTION 2 of 4

verapamil Side Effects

Oral tablet

Side effects that you should report to your doctor or health care professional as soon as possible:

  • difficulty breathing
  • dizziness or light headedness
  • fainting
  • fast heartbeat, palpitations, irregular heartbeat, or chest pain
  • skin rash
  • slow heartbeat
  • swelling of the legs or ankles

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • constipation
  • facial flushing
  • headache
  • nausea, vomiting
  • sexual dysfunction
  • weakness or tiredness
SECTION 3 of 4

verapamil May Interact with Other Medications

Oral tablet

Do not take this medicine with any of the following:

  • cisapride
  • disopyramide
  • dofetilide
  • grapefruit juice
  • hawthorn
  • pimozide
  • red yeast rice

This medicine may also interact with the following medications:

  • barbiturates such as phenobarbital
  • cimetidine
  • cyclosporine
  • lithium
  • local anesthetics or general anesthetics
  • medicines for heart rhythm problems like amiodarone, digoxin, flecainide, procainamide, quinidine
  • medicines for high blood pressure or heart problems
  • medicines for seizures like carbamazepine and phenytoin
  • rifampin, rifabutin or rifapentine
  • theophylline or aminophylline
Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. This information is not a substitute for medical advice. Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.
SECTION 4 of 4

How to Use verapamil

Oral tablet

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. This medicine can be taken with or without food. Take your doses at regular intervals. Do not take your medicine more often than directed.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

  • heart or blood vessel disease
  • heart rhythm disturbances such as sick sinus syndrome, ventricular arrhythmias, Wolff-Parkinson-White syndrome, or Lown-Ganong-Levine syndrome
  • liver or kidney disease
  • low blood pressure
  • an unusual or allergic reaction to verapamil, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding
What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What should I watch for while using this medicine?

Check your blood pressure and pulse rate regularly. Ask your doctor or health care professional what your blood pressure and pulse rate should be and when you should contact him or her. Do not suddenly stop taking this medicine. Ask your doctor or health care professional how to gradually reduce the dose.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 25 degrees C (59 and 77 degrees F). Protect from light. Keep container tightly closed. Throw away any unused medicine after the expiration date.

What does the pill look like?

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Last Updated: September 14, 2009

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